干燥曲线及干燥速率曲线测定实验数据处理.doc

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1、序号　累计时间（分）总重量GT（g）干基含水量X（kg/kg）平均含水量XAV（kg/kg）干燥速率U×104[kg/（s·m2）]10108.62.0572.01593.123323107.31.9751.93632.883036106.11.8981.86312.6428491051.8281.79622.40255121041.7641.73252.40256151031.7011.67202.1623718102.11.6431.61462.1623821101.21.5861.55732.1623924100.31.5291.50002.1623102799

2、.41.4711.44272.1623113098.51.4141.38542.1623123397.61.3571.32802.1623133696.71.2991.27072.1623143995.81.2421.21342.1623154294.91.1851.15612.16231645941.1271.09872.1623174893.11.0701.04142.1623185192.21.0130.98412.1623195491.30.9550.92682.1623205790.40.8980.86942.1623216089.50.8410.81212

3、.1623226388.60.7830.75801.9220236687.80.7320.70701.92202469870.6820.65921.6818257286.30.6370.61461.6818267585.60.5920.56691.9220277884.80.5410.51591.92202881840.4900.46821.6818298483.30.4460.42361.6818308782.60.4010.38221.44153190820.3630.34711.2013329381.50.3310.31850.9610339681.10.306

4、0.28981.2013349980.60.2740.25801.20133510280.10.2420.22930.96103610579.70.2170.20061.20133710879.20.1850.16881.20133811178.70.1530.14010.96103911478.30.1270.11460.96104011777.90.1020.08920.96104112077.50.0760.06690.72084212377.20.0570.04780.72084312676.90.0380.03180.48054412976.70.0250.

5、01910.48054513276.50.0130.00640.48054613576.3干燥实验数据整理表设备编号：1#空气孔板流量计读数R（KPa)0.5干球温度t(℃)60流量计处空气温度to(℃)48.8湿球温度tw(℃)40to(℃)空气密度ρ(Kg/m3)1.11tw℃下水的气化热(kJ/kg)γtw2600流量计孔流系数C00.65洞道截面积(m2)=0.13*0.170.0221孔板孔径d0(m)0.04干燥面积(m2)S=0.141*0.082*2=0.框架重量GD（g)60.6绝干物料量GC：(g)15.7对流传热系数α(w/m2℃)=40.60干

6、燥器内空气实际体积流量Vt(m3/s)=0.0254干燥器内空气流速u(m/s)=1.1477计算实例：空气物理性质的确定：流量计处空气温度to=48.8(℃)，查表得空气密度ρ=1.11(Kg/m3)湿球温度tw=40(℃)，tw℃下水的气化热(kJ/kg)γtw=2600。以第一组数据为例1、计算干基含水量X=（总重量GT-框架重量GD-绝干物料量GC）/绝干物料量GC=(108.6-60.6-15.7)/15.7=2.057（kg/kg）2、计算平均含水量XAV=两次记录之间的平均含水量=(2.057+1.975)/2=2.0159（kg水/kg绝干物料）3、计

7、算干燥速率U=-（绝干物料量GC/干燥面积S）*（△X/△T）=-（15.7*0.001/0.))*(1.975-2.057)/(3*60)=0.[kg/（s·m2）]4、绘制干燥曲线（X—T曲线）和干燥速率曲线（U—XAV曲线）5、计算恒速干燥阶段物料与空气之间对流传热系数α[W/m2℃]Uc—恒速干燥阶段的干燥速率，kg/（m2•s）=0.γtw—tw℃下水的气化热，kJ/kg。查表P351,tc-t=374-40=334℃.查表得,γtw=2600α=2.162*0.0001*2600*1000/(60-40)=28.116、计算干燥器内空气实